export type PortableProfileRecoveryEnvelope = Readonly<{
    version: 'gdc-portable-profile-recovery-v1';
    profileId: string;
    walletKeyDerivationId: string;
    kdf: Readonly<{
        name: 'scrypt';
        saltBase64Url: string;
        cost: number;
        blockSize: number;
        parallelization: number;
        keyLength: 32;
    }>;
    cipher: 'A256GCM';
    ivBase64Url: string;
    ciphertextBase64Url: string;
    tagBase64Url: string;
}>;
export type PortableProfileRecoveryProtection = Readonly<{
    cost?: number;
    blockSize?: number;
    parallelization?: number;
}>;
export declare function createPortableProfileRecoveryEnvelope(input: Readonly<{
    profileId: string;
    walletSeed: string;
    walletKeyDerivationId: string;
    recoverySecret: string;
    protection?: PortableProfileRecoveryProtection;
}>): PortableProfileRecoveryEnvelope;
export declare function openPortableProfileRecoveryEnvelope(input: Readonly<{
    envelope: PortableProfileRecoveryEnvelope;
    recoverySecret: string;
}>): Readonly<{
    profileId: string;
    walletSeed: string;
    walletKeyDerivationId: string;
}>;